XML 133 R121.htm IDEA: XBRL DOCUMENT v3.21.2
Brumadinho dam failure - Arbitration proceedings in Brazil filed by shareholders and a class association (Details)
$ in Thousands, R$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2021
USD ($)
employee
individual
Jun. 30, 2020
USD ($)
Jun. 30, 2021
USD ($)
lawsuit
item
employee
individual
Jun. 30, 2021
BRL (R$)
lawsuit
item
employee
individual
Jun. 30, 2020
USD ($)
Dec. 31, 2020
Contingencies            
Expense incurred in relation to Brumadinho event | $ $ 185,000 $ 109,000 $ 300,000   $ 268,000  
Arbitration proceedings in Brazil filed by shareholders and a class association            
Contingencies            
Number of arbitration filed by minority shareholders     1 1    
Number of minority shareholders who filled one arbitration | item     166 166    
Number of arbitration filed by class association allegedly representing all minority shareholders     1 1    
Number of arbitration filed by foreign investment funds     1 1    
Total number of proceedings     3 3    
Estimated losses on legal proceedings     $ 346,000 R$ 1,800.0    
De-characterization of dams            
Contingencies            
Discount rate applied to cash flow projections 4.40%   4.40% 4.40%   3.50%
Labor Collective Civil Action            
Contingencies            
Number of workers represented | employee 246   246 246    
Number of employee fatal victims | employee 131   131 131    
Expense incurred in relation to Brumadinho event     $ 200 R$ 1.0    
Criminal lawsuit            
Contingencies            
Number of individuals charged | individual 16   16 16    
Minimum | Labor Collective Civil Action            
Contingencies            
Expense incurred in relation to Brumadinho event     $ 300 R$ 1.5    
Maximum | Labor Collective Civil Action            
Contingencies            
Expense incurred in relation to Brumadinho event     $ 600 R$ 3.0